
Thermocatalytic oxidation of a binary mixture of formaldehyde and toluene at ambient levels by a titanium dioxide supported platinum catalyst
- Author
- Hyejin Shin, Kumar Vikrant, Ki-Hyun Kim, Philippe Heynderickx (UGent) and Danil W. Boukhvalov
- Organization
- Abstract
- The thermocatalytic oxidative potential of various supported noble metal catalysts (SNMCs) is well-known for hazardous volatile organic compounds (VOCs), e.g., formaldehyde (FA) and toluene. However, little is known about SNMC performance against ambient VOC pollution with low concentration (subppm levels) relative to industrial effuluents with high concentrations (several hundred ppm). Here, the thermocatalytic oxidation performance of a titanium dioxide (TiO2)-supported platinum catalyst (Pt/TiO2) has been evaluated for a low-concentration binary mixture of FA and toluene at low temperatures and in the dark. A sample of TiO2 containing 1 wt% Pt with thermal reduction pre-treatment under hydrogen achieved 100 % conversion of FA (500 ppb) and toluene (100 ppb) at 130 °C and a gas hourly velocity of 59,701 h−1. Its catalytic activity was lowered by either a decrease in catalyst mass or an increase in VOC concentration, relative humidity, or flow rate. In situ diffuse reflectance infrared Fourier transform spectroscopy, density functional theory simulations, and molecular oxygen (O2) temperature–programmed desorption experiments were used to identify possible VOC oxidation pathways, reaction mechanisms, and associated surface phenomena. The present work is expected to offer insights into the utility of metal oxide-supported Pt catalysts for the low-temperature oxidative removal of gaseous VOCs in the dark, primarily for indoor air quality management.
- Keywords
- Formaldehyde, Toluene, Indoor air, Catalytic oxidation, Titanium dioxide, VOLATILE ORGANIC-COMPOUNDS, PHOTOCATALYTIC ACTIVITY, XPS, PERFORMANCE, TIO2, NANOPARTICLES, REGENERATION, TEMPERATURE, MECHANISM, REMOVAL
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01HM9EKEW30SBCAR6ATAXEJKBA
- MLA
- Shin, Hyejin, et al. “Thermocatalytic Oxidation of a Binary Mixture of Formaldehyde and Toluene at Ambient Levels by a Titanium Dioxide Supported Platinum Catalyst.” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 915, 2024, doi:10.1016/j.scitotenv.2023.169612.
- APA
- Shin, H., Vikrant, K., Kim, K.-H., Heynderickx, P., & Boukhvalov, D. W. (2024). Thermocatalytic oxidation of a binary mixture of formaldehyde and toluene at ambient levels by a titanium dioxide supported platinum catalyst. SCIENCE OF THE TOTAL ENVIRONMENT, 915. https://doi.org/10.1016/j.scitotenv.2023.169612
- Chicago author-date
- Shin, Hyejin, Kumar Vikrant, Ki-Hyun Kim, Philippe Heynderickx, and Danil W. Boukhvalov. 2024. “Thermocatalytic Oxidation of a Binary Mixture of Formaldehyde and Toluene at Ambient Levels by a Titanium Dioxide Supported Platinum Catalyst.” SCIENCE OF THE TOTAL ENVIRONMENT 915. https://doi.org/10.1016/j.scitotenv.2023.169612.
- Chicago author-date (all authors)
- Shin, Hyejin, Kumar Vikrant, Ki-Hyun Kim, Philippe Heynderickx, and Danil W. Boukhvalov. 2024. “Thermocatalytic Oxidation of a Binary Mixture of Formaldehyde and Toluene at Ambient Levels by a Titanium Dioxide Supported Platinum Catalyst.” SCIENCE OF THE TOTAL ENVIRONMENT 915. doi:10.1016/j.scitotenv.2023.169612.
- Vancouver
- 1.Shin H, Vikrant K, Kim K-H, Heynderickx P, Boukhvalov DW. Thermocatalytic oxidation of a binary mixture of formaldehyde and toluene at ambient levels by a titanium dioxide supported platinum catalyst. SCIENCE OF THE TOTAL ENVIRONMENT. 2024;915.
- IEEE
- [1]H. Shin, K. Vikrant, K.-H. Kim, P. Heynderickx, and D. W. Boukhvalov, “Thermocatalytic oxidation of a binary mixture of formaldehyde and toluene at ambient levels by a titanium dioxide supported platinum catalyst,” SCIENCE OF THE TOTAL ENVIRONMENT, vol. 915, 2024.
@article{01HM9EKEW30SBCAR6ATAXEJKBA, abstract = {{The thermocatalytic oxidative potential of various supported noble metal catalysts (SNMCs) is well-known for hazardous volatile organic compounds (VOCs), e.g., formaldehyde (FA) and toluene. However, little is known about SNMC performance against ambient VOC pollution with low concentration (subppm levels) relative to industrial effuluents with high concentrations (several hundred ppm). Here, the thermocatalytic oxidation performance of a titanium dioxide (TiO2)-supported platinum catalyst (Pt/TiO2) has been evaluated for a low-concentration binary mixture of FA and toluene at low temperatures and in the dark. A sample of TiO2 containing 1 wt% Pt with thermal reduction pre-treatment under hydrogen achieved 100 % conversion of FA (500 ppb) and toluene (100 ppb) at 130 °C and a gas hourly velocity of 59,701 h−1. Its catalytic activity was lowered by either a decrease in catalyst mass or an increase in VOC concentration, relative humidity, or flow rate. In situ diffuse reflectance infrared Fourier transform spectroscopy, density functional theory simulations, and molecular oxygen (O2) temperature–programmed desorption experiments were used to identify possible VOC oxidation pathways, reaction mechanisms, and associated surface phenomena. The present work is expected to offer insights into the utility of metal oxide-supported Pt catalysts for the low-temperature oxidative removal of gaseous VOCs in the dark, primarily for indoor air quality management.}}, articleno = {{169612}}, author = {{Shin, Hyejin and Vikrant, Kumar and Kim, Ki-Hyun and Heynderickx, Philippe and Boukhvalov, Danil W.}}, issn = {{0048-9697}}, journal = {{SCIENCE OF THE TOTAL ENVIRONMENT}}, keywords = {{Formaldehyde,Toluene,Indoor air,Catalytic oxidation,Titanium dioxide,VOLATILE ORGANIC-COMPOUNDS,PHOTOCATALYTIC ACTIVITY,XPS,PERFORMANCE,TIO2,NANOPARTICLES,REGENERATION,TEMPERATURE,MECHANISM,REMOVAL}}, language = {{eng}}, pages = {{12}}, title = {{Thermocatalytic oxidation of a binary mixture of formaldehyde and toluene at ambient levels by a titanium dioxide supported platinum catalyst}}, url = {{http://doi.org/10.1016/j.scitotenv.2023.169612}}, volume = {{915}}, year = {{2024}}, }
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